Hey,I was looking for the pin assignment on my UNO and I ran into a page that was "members only" and there was no registration option. under hardware>UNO>Input Output>mapping pins to ATMega328 any idea how I can register for a password.I thought this was supposed to be open source

I'm just a volunteer with no life, I don't know about the inner workings of the "powers that be". I suspect its an oversight, the stuff is widely available all over the net. The Uno is largely the same as earlier model Arduinos, The Duemilanove was around a while and is largely similar so most stuff for the Duemilanove also applies to the UNO.